{"user_id": "C00001", "user_profile": {"age": 35, "gender": "Unknown", "loyalty_member": 0}, "model_used": "lightgbm", "store_id": "S001", "latency_ms": 57.952, "is_fallback": false, "fallback_notice": "", "fallback_notice_en": "", "recommendations": [{"product_id": "P0016", "product_name": "Dark Chocolate 90%", "brand": "Mars", "category": "White", "cocoa_percent": 90, "weight_g": 50, "probability": 6.296602348205144e-06}, {"product_id": "P0129", "product_name": "Truffle Chocolate 90%", "brand": "Cadbury", "category": "White", "cocoa_percent": 90, "weight_g": 80, "probability": 6.296602348205144e-06}, {"product_id": "P0136", "product_name": "Dark Chocolate 90%", "brand": "Mars", "category": "Milk", "cocoa_percent": 90, "weight_g": 200, "probability": 6.263243271252506e-06}, {"product_id": "P0025", "product_name": "Praline Chocolate 90%", "brand": "Lindt", "category": "Truffle", "cocoa_percent": 90, "weight_g": 120, "probability": 6.248448783669382e-06}, {"product_id": "P0024", "product_name": "Milk Chocolate 70%", "brand": "Cadbury", "category": "White", "cocoa_percent": 70, "weight_g": 100, "probability": 6.248448783669382e-06}]}